diff --git a/demo/postgresql/midpoint-additions-for-standalone-run.yml b/demo/postgresql/midpoint-additions-for-standalone-run.yml
index d89165f..2e3cabe 100644
--- a/demo/postgresql/midpoint-additions-for-standalone-run.yml
+++ b/demo/postgresql/midpoint-additions-for-standalone-run.yml
@@ -3,22 +3,21 @@
 #
 # (in this directory)
 #
-# $ docker-compose up --build
+# $ docker-compose up
 #
 # (in ../midpoint directory)
 #
-# $ docker-compose -f docker-compose.yml -f ../demo/postgresql/midpoint-additions-for-standalone-run.yml up --build
+# $ docker-compose -f docker-compose.yml -f ../demo/postgresql/midpoint-additions-for-standalone-run.yml up midpoint-server
 #
 # It expects that PostgreSQL is started independently of midPoint. When executing the containers in this way, there are two compositions with the following containers:
 #
 # "midpoint"
 #
-# 1) midpoint-server
-# 2) midpoint-data    <-- this is the original MariaDB container; it will execute command of 'true' i.e. exiting just upon the startup
+# - midpoint-server
 #
 # "postgresql"
 #
-# 1) postgresql
+# - postgresql
 #
 
 version: "3.3"
@@ -28,18 +27,11 @@ services:
     environment:
      - REPO_DATABASE_TYPE=postgresql
      - REPO_HOST=postgresql
-     - REPO_PORT=5432
      - REPO_DATABASE=midpoint
      - REPO_USER=midpoint
     networks:
      - postgresql_net
 
-  # effectively disable original MariaDB service
-  midpoint-data:
-    image: alpine:latest
-    command: "true"
-    entrypoint: "true"
-
 networks:
   postgresql_net:
     external: true
diff --git a/demo/postgresql/midpoint-additions.yml b/demo/postgresql/midpoint-additions.yml
index 5dfb3d9..5cf43d4 100644
--- a/demo/postgresql/midpoint-additions.yml
+++ b/demo/postgresql/midpoint-additions.yml
@@ -3,13 +3,12 @@
 #
 # (in ../midpoint directory)
 #
-# $ docker-compose -f docker-compose.yml -f ../demo/postgresql/midpoint-additions.yml up --build
+# $ docker-compose -f docker-compose.yml -f ../demo/postgresql/midpoint-additions.yml up midpoint-server postgresql
 #
 # It expects that PostgreSQL is started as part of midPoint composition. So there will be three containers there:
 #
 # 1) midpoint-server
 # 2) postgresql
-# 3) midpoint-data    <-- this is the original MariaDB container; it will execute command of 'true' i.e. exiting just upon the startup
 #
 
 version: "3.3"
@@ -17,7 +16,6 @@ version: "3.3"
 services:
   postgresql:
     build: ../demo/postgresql/postgresql/
-    entrypoint: ["/docker-entrypoint.sh", "postgres"]           # for some reasons this is needed for the correct initialization
     environment:
      - POSTGRES_PASSWORD=password
     expose:
@@ -33,15 +31,8 @@ services:
     environment:
      - REPO_DATABASE_TYPE=postgresql
      - REPO_HOST=postgresql
-     - REPO_PORT=5432
      - REPO_DATABASE=midpoint
      - REPO_USER=midpoint
 
-  # effectively disable original MariaDB service
-  midpoint-data:
-    image: alpine:latest
-    command: "true"
-    entrypoint: "true"
-
 volumes:
   postgresql_data:
diff --git a/midpoint/.env b/midpoint/.env
index 9b1bf15..2d25ece 100644
--- a/midpoint/.env
+++ b/midpoint/.env
@@ -4,7 +4,7 @@ USERTOKEN=3.9-SNAPSHOT
 REPO_DATABASE_TYPE=mariadb
 REPO_JDBC_URL=default
 REPO_HOST=midpoint-data
-REPO_PORT=3306
+REPO_PORT=default
 REPO_DATABASE=midpoint
 REPO_USER=root
 REPO_PASSWORD_FILE=/run/secrets/m_database_password.txt
diff --git a/midpoint/docker-compose.yml b/midpoint/docker-compose.yml
index 1a6d7e7..430dcde 100644
--- a/midpoint/docker-compose.yml
+++ b/midpoint/docker-compose.yml
@@ -21,8 +21,6 @@ services:
 
   midpoint-server:
     build: ./midpoint-server/
-    depends_on:
-      - midpoint-data
     expose:
       - 443
     ports:
diff --git a/midpoint/midpoint-server/Dockerfile b/midpoint/midpoint-server/Dockerfile
index c2e274a..6baaf22 100644
--- a/midpoint/midpoint-server/Dockerfile
+++ b/midpoint/midpoint-server/Dockerfile
@@ -42,7 +42,7 @@ VOLUME ${MP_DIR}/var
 # Repository parameters
 
 ENV REPO_HOST midpoint-data
-ENV REPO_PORT 3306
+ENV REPO_PORT default
 ENV REPO_USER root
 ENV REPO_DATABASE midpoint
 ENV REPO_JDBC_URL default
diff --git a/midpoint/midpoint-server/container_files/mp-dir/repository-url b/midpoint/midpoint-server/container_files/mp-dir/repository-url
index 8681880..2ba287a 100755
--- a/midpoint/midpoint-server/container_files/mp-dir/repository-url
+++ b/midpoint/midpoint-server/container_files/mp-dir/repository-url
@@ -1,6 +1,33 @@
 #!/bin/bash
 
+function resolvePort() {
+    if [ $REPO_PORT == "default" ]; then
+        case $REPO_DATABASE_TYPE in
+            mariadb)
+              echo 3306
+              ;;
+            mysql)
+              echo 3306
+              ;;
+            oracle)
+              echo 1521
+              ;;
+            postgresql)
+              echo 5432
+              ;;
+            sqlserver)
+              echo 1433
+              ;;
+            *)
+              echo "~~~~~ please supply JDBC port for your repository ~~~~~"
+        esac
+    else
+        echo $REPO_PORT
+    fi
+}
+
 if [ $REPO_JDBC_URL == "default" ]; then
+  REPO_PORT=$( resolvePort )
   case $REPO_DATABASE_TYPE in
 	mariadb)
 	  echo "jdbc:mariadb://$REPO_HOST:$REPO_PORT/$REPO_DATABASE?characterEncoding=utf8"